New Divorce Fight for SAC's Cohen

A U.S. appeals court partially reinstated a lawsuit against billionaire hedge-fund manager Steven A. Cohen by his ex-wife, adding to the legal headaches of Mr. Cohen.

The court ruled Wednesday that a lower court erred when it threw out Patricia Cohen's claims, which asserted that Mr. Cohen had hidden assets from her during their divorce proceedings. Her suit also alleged that Mr. Cohen engaged in insider trading during the 1980s and...